复杂地形在不同大气条件下流场显示实验研究  

Visualization experiments of flow field in stratified atmospheres over complex terrain

作　　者：梁彬[1] 朱凤荣[1] 李长龄[1] 孟宪忠[1] 张伯寅[1] 桑建国[2] 刘和平[2] 

机构地区：[1]北京大学湍流与复杂系统研究国家重点实验室,北京100871 [2]北京大学地球物理系,北京100871

出　　处：《流体力学实验与测量》2003年第1期59-63,共5页Experiments and Measurements in Fluid Mechanics

基　　金：国家自然科学基金资助项目(4001161948)

摘　　要：在拖曳式水槽中利用不同密度分层的盐水来模拟不同的大气条件。对香港岛铜锣湾地带的污染情况进行了不同大气条件下的流场显示实验。从该地区在常年风作用下流场的变化,找出污染物不易扩散的原因。Laboratory observation of pollution dispersion over complex topography in towing tank experiments with salt water as stratifying agent has proved to be a useful modeling means in the investigation of pollution dispersion characteristics over complex terrain in stratified atmospheres. Various phenomena of pollution dispersion under conditions of elevated inversion were also useful modeled. Flow visualization technique made it possible to directly and clearly observe the flow field and the dye streakline can be quantified by means of image processing enabling the pollution concentration field to be detected. Numerical modeling of the same problem was also carried out and satisfactory agreement between the computed and the observed results were obtained.

关 键 词：复杂地形 大气条件 流场显示 实验研究 实验模拟 污染扩散 层结大气 

分 类 号：X51[环境科学与工程—环境工程] X169